Transmission mechanism



C. SANG.

TRANSMISSIQN MECHANISIVI.

APPLICATION FILED MAR, 17, 1920.

Patented Aug. 22, 1922.

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Specification of Letters Patent.

Patented flug'. 22%, 19232.

Application filed. March 17, 1920. Serial No. 366,677.

Be it known that l, CHARLIE SANG, a citizen of the United States7 yresiding at Castorville, in the county of Monterey and State of California, have invented a new and useful improvement in rlransmission Mechanism, of which the following is a specification.

This invention relates to a power transmission means for motor vehicles.

it is the principal object of the present invention to provide a simple and directly acting transmission mechanism for motor vehicles whereby various speed changes may be easily made to produce a desired change in ratio between the driving and driven shafts of the transmission.

The present invention contemplates the use of main and auxiliary drive shafts, the auxiliary7 shaft carrying a set of gears, two of which are in constant mesh with gears upon the main shaft and a third gear adapted to be brought to mesh with a sliding gear on the main shaft.

The invention is illustrated by way of example in the accompanying drawing, in which:

The figure is an enlarged view in section and elevation showing the power transmission mechanism.

Referring more particularly to the drawings, 10 indicates a gear case having a cover plate 11 and a. removable bearing plate 12. rThis plate 12 carries a bearing cup 13 within which anti-friction rollers 1.4L are housed. The gear case is further formed with a bearing` cup 15 upon the opposite end of the case and in longitudinal alignment with the cup 13. The cup 15 carries anti-friction rollers 16. An engine shaft 17 extends in through the cup 13 and is keyed to the sleeve 1S of a driving gear 19. The sleeve or hub portion 1S of the gear 19 entends a consid.- erable length along the shaft 17 and is rotatably supported by the anti-friction rollers 14. T he end of shaft 17 terminates within the bore of the gear 19 and thus accommodates the spindle 2O of a squared shaft 21 which is free to rotate in relation to the gear and a bushing 22 carried within the gear. The shaft 21 is in longitudinal alignment with the shaft 17 and is rotatably supported at its opposite end by the anti-friction bearing 16.

Mounted parallel to the aligned shafts 17 and 21 is a jack shaft 23. rlhis shaft carries gears 24, and 26, all of which gears are free to rotate vin relation to the shaft 23 as supported upon roller bearing 27. The gears 24; and 26 are formed with elongated hubs or sleeves provided at their adjacent ends with bolting flanges 28. These flanges rest upon the opposite sides of the gear 25 and are rigidly secured thereto by cap screws 29. Due to this construction all three of the gears 24, 25 and 26 will rotate in unison around the shaft 23 as driven in the manner hereinafter to be described.

TheV body portion 'of the shaft 21 is" squared and is reduced to form a cylindrical extending portion 21L which projects through ,a final drive gear and the bear-ing 21 thereafter being fitted with any suitable coupling'member 32. The squared portion of the shaft carries a sliding gear 33 which is adapted to be shifted by means of a yoke -member 311. The yoke is formed with forlrs `extending along the opposite sides ofthe gear and registering with grooves 85 in the hubs of this gear. The yoke member 34 is fixed to a shifting rod 36 which may be operated as desired. A jaw clutch 37 is formed on the end of the hub adjacent the gear 19 while a complementary jaw yclutch 3S is formed on the end of the hub of gear 19 and adapted to be brought to mesh therewith. i

ln operation of the present invention the shaft 17 is directly connected with an engine clutch mechanism or if desired may be connected to the driving shaft of the usual speed changing transmission. In this case the device embodied in the present invention will be interposed between the usualy transmission and the driving axle so that additional speeds may be obtained in combination with the original transmission. In any event a high driving speed would be obtained by bringing the jaw clutches 37 and 38 into mesh. This will connect the shaft 17 directly to the shaft 21 and will eliminate any gear reduction. Then the clutch members are disengagedl and intermediate speed will be instantly produced due to the fact that gears 19 and 24C are in constant mesh as well as gears 26 and 30, thus by shifting the gear 33 so that its opposite end clutch face 87 may engage a similar face 38 on the hub of gear 30. rlhe gear 30 will be locked to rotate the shaft 21 and power will be transmitted through the gear 19 to the gear 2a along the sleeve structure comprising gears 211 and 26 and then rotating the gears 26 and 8O with the resulting rotation of the shaft 2l. ln the event that an extreme high gear ratio is desired the gear 33 is moved into mesh with the gear and due to the large diameter of the gear 25 in relation to the gear 33 a material reduction in lthe driving ratio will be brought about and the shaft 2l driven at its lowest speed. It will thus be seen that the present invention provides a simple and compact power transmission mechanism equipped with easily operating means Wiereby changes in the driving ratios in a driving and driven shaft may be readily brought about. v

wWhile l have shown the preferred form or my invention as now lmoivn to me, it-Wi-ll bevunderstood that'various changes inthe construction, combination and arrangement or parts may be made by those skilled in the yart Without departing' 'from the spirit of the invention as claimed.

Having thus described my invention, what I'claim and desire to secure by Letters Patent, is: i I i A power transmission mechanism comprising a drive shaft, a gearkeyed on the `driver shaft having a clutch lfacer thereon 4and also having an elongated journal bearing formed therein, in Which the drive shaft having' has substantial mounting, a driven sha-ft having a short reduced end journaled with* in said gear', with its inner end lying adj acent the inner end of the drive shaft, a gear Jireely mounted on thev driven shaft and having aclutch face on one end thereof, a slidinggear splined to the driven shaft and clutchaees on opposite ends thereor", a shifting rod slidably mounted above the driven shaft, a yokey secured to said shifting rod and engaging the sliding gear for shitting the latter in opposite extreme and intermediate positions when the shifting rod isv actuated, an auxiliary shaft, sleeves rotatably mounted on. the auxiliary shaft, a gear formed at the outer end of the sleeves,

one in constanty mesh with said xed gear on the drive shaft and the other in constant mesh with the free gear on the driven shaft, and an intermediate gear on the auxiliary shaft, said sleeves each having a iange at its inner end bolted to said intermediate gear, said intermediate gear being arranged for meshing engagement with said sliding gear.

CHARLIE SANG.

Witnesses I SAM AHTYE, JAMES M. ABBETT. 

